Li Jinglong suffered a crushing defeat. At nightfall, Li Jinglong retreated from Zhengcunba hastily, and the remaining attack force in Beiping was subsequently surrounded and defeated by the Yan forces. The Battle of Zhengcunba was concluded by the retreat of Li Jinglong back to Dezhou. The government forces lost more than 100,000 men in this battle. On 9 November, Zhu Di returned to Beiping and wrote to the imperial court about his intention to remove Qi Tai and Huang Zicheng from their post. Jianwen Emperor declined to respond. In December, Wu Gao was dismissed from his post in Liaodong by the imperial court, and Zhu Di decided to attack Datong. The Yan forces reached Guangchang on 24 December, and the garrison surrendered. On 1 January 1400, the Yan forces reached Weizhou and met with no resistance yet again. On 2 February, the Yan forces reached Datong and began its siege on the city. The strategic importance of Datong was significant to the imperial court, and Li Jinglong was forced to reinforce the city in a hurried manner. However, Zhu Di returned to Beiping before the government forces could arrive, and the government forces suffered a considerable number of non-combat casualties. With his troops exhausted, Jinglong wrote to Zhu Di and requested an armistice. During the attack in Datong, several forces from Mongolia surrendered to the Yan forces. In February, the garrison at Baoding also surrendered. Battle of Baigou River In April 1400, Li Jinglong mobilized 600,000 men and began advancing northwards toward the Baigou River. On 24 April, the Yan forces engaged with the government forces in a decisive battle. The government forces ambushed Zhu Di, and the Yan forces suffered a series of defeats initially. Landmines were placed in the retreat path of the Yan forces by the government forces, which inflicted heavy losses on the Yan army on their way back to the camp. A new battle ensued the following day, and the government forces were successful in attacking the rear of the Yan forces. Zhu Di led a personal charge against the main force of Li Jinglong, and the battle turned into a stalemate as Zhu Gaochi arrived with reinforcements. At this point, the wind started to blow and snapped the flag of Li Jinglong in half, which led to chaos in the government camp. Zhu Di seized the opportunity and launched a general assault and defeated